两位独立数码管100进制计数器，每1秒计数一次。从0到99，到99后又回到0.-Two independent 100-band digital tube counters, every time 1 seconds count. From 0 to 99, to 99 and then back to 0.

一个课表程序，可以制作课表然后按时提醒您。-A curriculum program, you can create curriculum and schedule to remind you.

24Mhz的频率分成2Mhz的频率。 再由一个I/O口输出。-The frequency of 24Mhz into2Mhz frequency，Again by an I/O port output.